.login-container{
    width: 100%;
    /* 减号前后要空格，否则会被认为是属性 */
    height: calc(100% - 50px);
    /* background-color: aquamarine; */
    display:flex;
    /* 垂直水平居中 */
    justify-content: center;
    align-items: center;
}

.login-dialog{
    width: 400px;
    height: 400px;
    background-color: rgb(255, 255, 255,0.5);
    border-radius: 20px;
    
}
.login-dialog h3{
    text-align: center;
    padding: 40px 0;
}

.login-dialog .row{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 50px;
}
.row span{
    width: 74px;
}

#username,#password{
    height: 30px;
    font-size: 22px;
    border: none;
    border-radius: 10px;
    width: 200px;
}
#submit{
    width: 250px;
    height: 30px;
    border: none;
    border-radius: 10px;
    /* 设置字体颜色 */
    color: #f0f2f3;
    background-color: #30d8f2;
}
